James McAvoy on 'X-Men: Days of Future Past': "There's heavy stuff"

James McAvoy has said to expect "heavy stuff" in the upcoming X-Men: Days of Future Past.

The Welcome to the Punch star will reprise his role as Professor Charles Xavier in the superhero sequel, which will see director Bryan Singer bring together the cast of X-Men: First Class and the stars of the franchise's first three outings.

Speaking to Digital Spy, McAvoy discussed the fate of Xavier's hair and what's in store for the character in the dual-timeline X-Men sequel. To hear what McAvoy and director Bryan Singer have to say about Days of Future Past, watch the video above.